Search for September half marathons! Search for your next September half marathon at the September Half Marathon Calendar  USA website page. The calendar currently has September half marathons 2026, and will have September half marathons 2027 as they roll in. For races that are late in posting their September half marathon date, we do our best to get those dates updated throughout the year, as race directors and race organizers update their websites. Updates can also be subm

September Half Marathons https://www.halfmarathonsearch.com/half-marathons-september | September Half Marathon Calendar | Search for September Half Marathons 2026 | September Half Marathon Search | Half Marathon Calendar USA | Half Marathons in September